In about 1853, John Hawes of Ithaca, New York, made the first simple calendar clock in the U.S. Several years later, the first perpetual calendar clocks were produced. Perpetual models are superior to simple ones because they automatically adjust for leap years and differing numbers of days in the months. Most calendar clocks have two dials, one for time and the other for the date.
Seth Thomas “Number 10” walnut perpetual calendar shelf clock w/applied & turned decorations. Provisions for the date, day, & month are on the lower round tablet, eight-day time & strike, weight driven,36″ h. $4,000.
